Haven't heard of anyone else doing this so I took the risk and purchased the Dell XPS 15 (9550) with the FHD 1920x1080 matt display, Intel Skylake i7-6700HQ, 512GB PCIe SSD, 16GB DDR4, 84Wh battery. My experience is that usually Dell's have pretty good Ubuntu support, though Optimus can be a pain. The summary is that it does NOT automatically work with Ubuntu 15.10. Some tweaking is necessary but not too bad. Here are my experiences and instructions to get it to work with a UEFI install.

0) Might not be necessary but did the following:

BIOS > Secure Boot > Disabled

1) The PCIe hard drive won't be recognized by live Ubuntu 15.10 by default. Change RAID to AHCI. When it works it will appear as /dev/nvme0n1.

BIOS>System Configuration>SATA Operation> switch RAID to AHCI

2) Random freezes will happen with the live Ubuntu 15.10. Symptoms are random freezes and infinite errors, something like the following: nouveau PFIFO SCHED_ERROR. Fix by pressing 'e' on grub menu during boot and add "nouveau.modeset=0" to the end of the line starting with "linux". Now boot live disk by pressing F10.

3) Touchpad might not work. For some reason it worked for me the first time and then never again. Easiest is to use a USB mouse temporarily. There's a fix for after install is finished.

6) Try booting, but make sure you press SHIFT repeatedly during boot to get to grub menu. Repeat step (2) above.

7) On first successful boot edit /etc/default/grub, GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nouveau.modeset=0". Then run "sudo update-grub". Now won't need to manually change grub settings on every boot.

9) Graphics will be weird and flaky. The Nvidia drivers in the standard repositories are also a bit too old and will be flaky. I found that the new graphics-driver PPA worked well. Didn't try downloading from Nvidia directly. Bumblebee didn't work for me, giving a black screen, so Nvidia PRIME is recommended.

- webcam works seemlessly, good color and resolution, but HORRIBLE un-useable placement at bottom of screen
- Cheese and Skype worked with webcam, Google Chrome PPA with Google Hangeouts didn't work
- speakers are a big step up from my Lenovo T430s

Remaining weird behavior not solved yet:

- HDMI output not always detected with Intel or Nvidia, hopefully small bug that will be fixed soon (VGA dongle working fine)
- laptop mic not detected by system, my headphone mic doesn't work either, probably a minor Ubuntu 15.10 bug and not a laptop driver issue
---- seems to work with Kernel v4.3
- bluetooth doesn't detect my external speaker, driver bug that should be fixed soon, I think it's related to this: https://bugs.launchpad.net/ubuntu/+s...z/+bug/1448566
- suspend/resume results in black screen
---- @parallelo fixed by installing kernel v4.3
- occasionally touchpad cursor jumps down/left because of using thumb for left-clicks, this shouldn't happen, probably some manual tweaks can fix this
- slow touchpad acceleration, system settings insufficient, need some manual tweaks
- login screen hangs until wifi connects
- both Intel and Nvidia are tearing, system is useable though, hopefully will improve over time with driver updates
- Sometimes switching graphics with 'nvidia-settings' doesn't work. Sometimes 'nvidia-select' works. My guess is that there is a minor Nvidia bug that will soon be fixed
- boot takes a long time, 20 seconds (old Lenovo 430s only took 10 seconds), i think this is just the slow Dell post

Otherwise the system seems to be woraking well. No crashing/freezing issues which is great. Hopefully this guide will save others a few hours (or days!) of pain. Please post your improvements/updates to this procedure to help us all out!

@jchedstrom - registered just to thank you This is exactly what I was looking for before deciding if I should buy that machine - exactly the configuration I'd go with too. Thank you for going through the work to figure things out - should be a real time saver.

If it's not too much trouble, do you have any information on battery life, and does the laptop seem to run cool and quiet enough in Linux? I used to have a dual-graphics laptop before that ran cool in Windows, but would burn up in Linux no matter what power/processor/video settings I tried, but that those were AMD cards.

Many thanks jchedstrom. I'm still undecided. I currently have the Dell M3800 and can install Linux in around 30 minutes without any problems. I'm still leaning toward this XPS 9550 as I haven't seen any other Skylake laptops out there that are viable options.

I did NOT mount a separate /var directory and I was able to move on. Just as an FYI, I had to set the Install Bootloader path to /dev/nvme0n1 since there's a known bug about the Ubuntu install not selecting the correct partition.

@astroman: wifi card works well with good performance and range. The wifi connection rate seems to be reported incorrectly. External monitor support has been flaky and isn't always available. This is a HUGE problem for presentations. Going to try a VGA dongle today. Note that just discovered that bluetooth doesn't work.

A few people asked me about heat and battery life. Under typical light usage (email, web browsing, text editing, watching x264 encoded movies) the 84wh battery lasts ~6 hours if you use the Intel GPU only (Nvidia off). A short test makes me believe that using Nvidia gives similar battery life. They must be doing a good job of putting GPU in a low power state.

The laptop has nice air-flow design with a long intake the whole width of the bottom and a protected exit pointing into the hinge of the screen. It's unlikeally to block the air intake and impossible to block the air exit. Generally the fan is pretty quiet. I did some numerical simulations which runs 8 threads at 100% CPU and was impressed that after 5 minutes didn't see any throttling. Heat and fan noise was acceptable.

Running Boarderlands 2 game with max graphic settings with Nvidia GPU made the fan roar. Power draw was about 74 watts according to battery report. Therefore only ~1 hour of battery life in this case. Bottom of laptop was hot but less than burning hot.

I doubt 14.03 LTS will work. The main problems were with the new fancy GPU not having good nouveau compatibility and the new fancy Intel raid not displaying NVME hard drive. So an older OS release would likely be problematic. This laptop is on the bleeding edge of hardware so it's not surprising that a few tweaks are necessary. Actually the fact that I've had zero crashes/freezes so far is pretty impressive. You'll probably need to wait until 16.04 if you want to install without manually overcoming a few problems.